CN106611863B - A kind of structure for preventing bipolar plates from corroding in flow cell pile - Google Patents
A kind of structure for preventing bipolar plates from corroding in flow cell pile Download PDFInfo
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- CN106611863B CN106611863B CN201510676675.2A CN201510676675A CN106611863B CN 106611863 B CN106611863 B CN 106611863B CN 201510676675 A CN201510676675 A CN 201510676675A CN 106611863 B CN106611863 B CN 106611863B
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- electrode frame
- bipolar plates
- electrolyte
- hole
- negative electrode
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- 239000003792 electrolyte Substances 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 37
- 125000004122 cyclic group Chemical group 0.000 claims abstract description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- -1 polyethylene Polymers 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 2
- 239000004800 polyvinyl chloride Substances 0.000 claims description 2
- 239000011120 plywood Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000004087 circulation Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000376 reactant Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 208000019901 Anxiety disease Diseases 0.000 description 1
- ZRXYMHTYEQQBLN-UHFFFAOYSA-N [Br].[Zn] Chemical compound [Br].[Zn] ZRXYMHTYEQQBLN-UHFFFAOYSA-N 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000012983 electrochemical energy storage Methods 0.000 description 1
- 230000005518 electrochemistry Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04276—Arrangements for managing the electrolyte stream, e.g. heat exchange
- H01M8/04283—Supply means of electrolyte to or in matrix-fuel cells
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/18—Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells
- H01M8/184—Regeneration by electrochemical means
- H01M8/188—Regeneration by electrochemical means by recharging of redox couples containing fluids; Redox flow type batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
- Hybrid Cells (AREA)
Abstract
The present invention relates to a kind of anti-corrosion structures of flow battery, the in particular to anti-corrosion structure of the bipolar plates in flow battery.It is not only provided with the electrolyte liquid in-out mouth being connected to common line in electrode frame, while being also equipped with the through-hole of another pole electrolyte circulation.Identical with the bipolar plate thickness annular boss of through-hole setting height in the electrode frame close to bipolar plates side, the through-hole of bipolar plates is placed in the outer rim of annular boss, then is pressed and upper another pole electrode frame.Electrolyte liquid flows to the electrolyte inlet or liquid outlet of negative electrode frame after the through-hole of anode electrode frame and cyclic annular convex；Anode electrolyte flows to the electrolyte inlet or liquid outlet of anode electrode frame after the through-hole of negative electrode frame and cyclic annular convex, avoid contact of the electrolyte with bipolar plates in common line, the generation of corrosion phenomenon is fundamentally prevented, the reliability of pile is improved.
Description
Technical field
The present invention relates to a kind of anti-corrosion structures of flow battery, the in particular to anticorrosion of the bipolar plates in flow battery
Structure.
Background technique
Currently, the whole world is faced with shortage of resources, the situation of energy supply anxiety significantly limits the hair of global economy
Exhibition.Develop the climax that efficient renewable energy has welcome development in this context.However renewable energy is intrinsic not
Continuity and anti-tune peak character make it cause huge impact to power grid when accessing power grid on a large scale, thus one kind is renewable
The grid-connected buffer technology among smart grid of the energy has been mentioned the forward position of electric power network technique transition.Energy storage technology is as the buffering
Technology obtains more and more concerns, wherein flow battery welcome in recent years as electrochemical energy storage device technological innovation with
And the great development of industrialization, there are many flow battery technologies by commercialization, including all-vanadium flow battery, zinc bromine liquid stream electricity at present
Pond etc..Flow battery is because of its innate advantage: power and energy decoupling are particularly suitable for the application of extensive energy storage.
One distinguishing feature of flow battery is that reactant and power apparatus decouple, and carries the electrolyte of reactant by following
Ring pump, which flows into battery, to be participated in reacting, and product is flowed out by battery, is returned in fluid reservoir, is looped back and forth like this.Liquid stream electricity
The monocell in pond is by cell end plate, collector plate, anode electrode frame, anode electrode, amberplex, negative electrode, negative electrode
Frame, collector plate and cell end plate sequence assemble, and the leakage of electrolyte is then prevented by the bolt presses on end plate.In reality
In, flow cell pile is formed often to meet the needs of high-power charge and discharge.Pile is on the basis of monocell more
It is connected between a monocell with bipolar plates, then is cascaded by the way of filter press and forms pile.In flow cell pile
In, electrolyte evenly distributing between each battery becomes an important factor for being different from other battery stacks, thus most
The branch line of electrolyte common line and electrolyte is all devised in flow cell pile.Common line is by every batteries
Through-hole even on positive and negative electrode electrode frame, bipolar plates and amberplex combines to be formed.The axis of its pipeline is often parallel to
The thickness direction of above-mentioned pile component；Branch line mostly designs in positive and negative electrode electrode frame, is mainly responsible for electrolyte in electrode
In evenly distribute.
Due to the cell voltage difference between the conducting solution and each monocell in common line, in common line often
Leakage current is formed, size is related with the joint number of monocell in the sectional area of common line, length and pile.In bipolar plates
The through hole section of composition common line is in contact with the electrolyte in common line.Constitute bipolar plates material be often graphite,
The metal of carbon composite or acid-alkali-corrosive-resisting, leakage current can lure that oxygen occurs for the through hole section on bipolar plate thickness into
Change reaction, bipolar plates burn into is caused to soften, in turn results in pile leakage.
Summary of the invention
In order to solve the etching problem of bipolar plates in above-mentioned flow battery, the present invention provides a kind of knots of flow battery
The through-hole of bipolar plates is placed on annular boss by the way that annular boss is arranged in the electrode frame of bipolar plates through-hole side by structure
In outer rim, then press and upper another pole electrode frame.Inlet or liquid outlet of the electrolyte Jing Guo electrode frame flow into or out electricity
Pole frame flows through the through hole that the annular boss being arranged in electrode frame flows directly into another pole by the common line in pile, keeps away
Contact of the electrolyte with bipolar plates in common line is exempted from, has fundamentally prevented the generation of corrosion phenomenon, improve pile
Reliability.
In order to achieve the above objectives, the technical solution adopted by the present invention are as follows:
The structure for preventing bipolar plates from corroding in the flow cell pile: flow cell pile component includes anode electrode
Frame, negative electrode frame and bipolar plates therein are sandwiched in, anode electrode frame is equipped with electrolyte liquid common line through-hole, anode
Electrode frame is equipped with the anode electrolyte inlet and liquid outlet that are connected with anode electrolyte common line, on negative electrode frame
Equipped with anode electrolyte common line through-hole, negative electrode frame is equipped with the negative electricity being connected with electrolyte liquid common line
Liquid inlet and liquid outlet are solved, bipolar plates are equipped with anode electrolyte common line and electrolyte liquid common line through-hole.
It is equipped with cyclic annular convex in the edge of anode electrode frame through-hole, cyclic annular convex is located at anode electrode frame close to double
On the surface of pole plate side, projection of the through-hole in the anode electrode frame surface close to bipolar plates side is located at the hollow of cyclic annular convex
Region, cyclic annular convex are equal to bipolar plate thickness along the height perpendicular to anode electrode frame surface direction；In negative electrode frame through-hole
Edge be equipped with cyclic annular convex, cyclic annular convex is located at negative electrode frame on the surface of bipolar plates side, through-hole in
Projection close to the negative electrode frame surface of bipolar plates side is located at the hollow region of cyclic annular convex, and cyclic annular convex is along perpendicular to negative
The height of pole electrode frame surface direction is equal to bipolar plate thickness；
Bipolar plates are clipped between anode electrode frame and negative electrode frame, and in bipolar plates through-hole shape and size it is right with it
The shape and size Xiang Wenhe of the surrounding side wall of the anode electrode frame upper annular convex and negative electrode frame upper annular convex answered.
In the structure for preventing bipolar plates from corroding, electrolyte liquid is after the through-hole of anode electrode frame and cyclic annular convex
Flow to the electrolyte inlet or liquid outlet of negative electrode frame；Through-hole of the anode electrolyte through negative electrode frame and cyclic annular convex
The electrolyte inlet or liquid outlet of anode electrode frame are flowed to afterwards, and electrolyte is not contacted with the through-hole edge of bipolar plates.
In the structure for preventing bipolar plates from corroding, bipolar plates are placed in the anode electrode frame with platform or are born
In the electrode frame of pole, the through-hole in bipolar plates is placed on cyclic annular convex outer rim, places another negative electrode frame or anode electrode later
Frame, makes that bipolar plates correspond to the electrolyte inlet on another negative electrode frame or anode electrode frame or liquid outlet, group install
At.
It can be in the described structure for preventing bipolar plates from corroding, between anode electrode frame, negative electrode frame and bipolar plates
It is fitted closely together by way of glue sticking or hot pressing connects.Bipolar plates are graphite plate, carbon composite plate or anti-corrosion
The poor metal material of erosion ability.The receptacle material of anode or negative electrode frame is polyethylene, polypropylene or polyvinyl chloride.
The present invention has the advantage that
1. the present invention has completely cut off the contact of electrolyte and bipolar plates through hole section in common line, electrochemistry is effectively prevented
The generation of corrosion improves the reliability of pile.
2. the configuration of the present invention is simple, at low cost, control easy to process, without the equipment investment of complex and expensive.
Detailed description of the invention
Fig. 1 is the electrode frame structure in flow cell pile of the invention.
Specific embodiment
Embodiment:
Used anode electrode frame, the structure of negative electrode frame and bipolar plates and cooperation are as follows: bipolar plates are located at positive and negative
Between the electrode frame of pole.Anode electrode frame is equipped with electrolyte liquid common line through-hole, and is equipped with and the public pipe of anode electrolyte
The anode electrolyte inlet and liquid outlet that road is connected；Corresponding, negative electrode frame is equipped with the public pipe of anode electrolyte
Road through-hole, and it is equipped with the electrolyte liquid inlet and liquid outlet being connected with electrolyte liquid common line, it is set in bipolar plates
There are anode electrolyte common line and electrolyte liquid common line through-hole.In anode electrode frame towards the through-hole of bipolar plates side
Edge be equipped with cyclic annular convex；Ring-type is equipped in the edge of negative electrode frame towards the through-hole of bipolar plates side
Convex.The cyclic annular convex being arranged in positive and negative electrode electrode frame is equal to bipolar along the height perpendicular to negative electrode frame surface direction
Plate thickness.Bipolar plates are clipped between anode electrode frame and negative electrode frame, and in bipolar plates through-hole shape and size it is right with it
The shape and size Xiang Wenhe of the surrounding side wall of the anode electrode frame upper annular convex and negative electrode frame upper annular convex answered.
Bipolar plates are placed on the anode electrode frame or negative electrode frame with platform, the through-hole in bipolar plates is placed on
Cyclic annular convex outer rim places another negative electrode frame or anode electrode frame later, and bipolar plates is made to correspond to another negative electrode frame
The either electrolyte inlet or liquid outlet on anode electrode frame, is completed.In pile operational process, electrolyte liquid warp
The electrolyte inlet or liquid outlet of negative electrode frame are flowed to after the through-hole of anode electrode frame and cyclic annular convex；Anode electrolyte
The electrolyte inlet or liquid outlet of anode electrode frame are flowed to after the through-hole of negative electrode frame and cyclic annular convex, electrolyte is not
It is contacted with the through-hole edge of bipolar plates.
Using the all-vanadium flow battery pile of structure assembling 1kW, pile is made of 10 batteries, and amberplex is
Nafion115, performance data are as follows: pile coulombic efficiency 94.1%, voltage efficiency 85.6%, energy efficiency 80.5%.By
Dismantling discovery bipolar plates through-hole edge has no corrosion after 1500 circulations, illustrates that the structure can prevent electrochemical corrosion well
Generation, improve pile reliability.
Claims (6)
1. prevented in a kind of flow cell pile bipolar plates corrode structure, flow cell pile component include anode electrode frame,
Negative electrode frame and bipolar plates therein are sandwiched in, anode electrode frame is equipped with electrolyte liquid common line through-hole, anode electricity
Pole frame is equipped with the anode electrolyte inlet and liquid outlet being connected with anode electrolyte common line, sets on negative electrode frame
There is anode electrolyte common line through-hole, negative electrode frame is equipped with the electrolyte being connected with electrolyte liquid common line
Liquid inlet and liquid outlet, bipolar plates are equipped with anode electrolyte common line and electrolyte liquid common line through-hole；It is special
Sign is:
It is equipped with cyclic annular convex in the edge of anode electrode frame through-hole, cyclic annular convex is located at anode electrode frame close to bipolar plates
On the surface of side, projection of the through-hole in the anode electrode frame surface close to bipolar plates side is located at the hollow area of cyclic annular convex
Domain, cyclic annular convex are equal to bipolar plate thickness along the height perpendicular to anode electrode frame surface direction；
It is equipped with cyclic annular convex in the edge of negative electrode frame through-hole, cyclic annular convex is located at negative electrode frame close to bipolar plates
On the surface of side, projection of the through-hole in the negative electrode frame surface close to bipolar plates side is located at the hollow area of cyclic annular convex
Domain, cyclic annular convex are equal to bipolar plate thickness along the height perpendicular to negative electrode frame surface direction；
Bipolar plates are clipped between anode electrode frame and negative electrode frame, and in bipolar plates through-hole shape and size it is corresponding
The shape and size Xiang Wenhe of the surrounding side wall of anode electrode frame upper annular convex and negative electrode frame upper annular convex.
2. the structure for preventing bipolar plates from corroding as described in claim 1, it is characterised in that:
Electrolyte liquid flowed to after the through-hole of anode electrode frame and cyclic annular convex negative electrode frame electrolyte inlet or
Liquid outlet；Anode electrolyte flowed to after the through-hole of negative electrode frame and cyclic annular convex anode electrode frame electrolyte inlet or
Person's liquid outlet, electrolyte are not contacted with the through-hole edge of bipolar plates.
3. the structure for preventing bipolar plates from corroding as described in claim 1, it is characterised in that: being placed in bipolar plates with platform
Anode electrode frame or negative electrode frame on, the through-hole in bipolar plates is placed on cyclic annular convex outer rim, places another cathode later
Perhaps anode electrode frame makes bipolar plates correspond to the electrolyte inlet on another negative electrode frame or anode electrode frame to electrode frame
Or liquid outlet, it is completed.
4. the structure for preventing bipolar plates from corroding as described in claim 1, it is characterised in that: anode electrode frame, negative electrode frame
And it is fitted closely together by way of glue sticking or hot pressing connects between bipolar plates.
5. the structure for preventing bipolar plates from corroding as described in claim 1, it is characterised in that: bipolar plates are that graphite plate or carbon are multiple
Plywood.
6. the structure for preventing bipolar plates from corroding as described in claim 1, it is characterised in that: the frame of anode or negative electrode frame
Body material is polyethylene, polypropylene or polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676675.2A CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676675.2A CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106611863A CN106611863A (en) | 2017-05-03 |
| CN106611863B true CN106611863B (en) | 2019-07-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676675.2A Active CN106611863B (en) | 2015-10-16 | 2015-10-16 | A kind of structure for preventing bipolar plates from corroding in flow cell pile |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112928320B (en) * | 2019-12-06 | 2022-03-15 | 中国科学院大连化学物理研究所 | Flow battery |
| CN114267861B (en) * | 2021-12-27 | 2024-05-14 | 华秦储能技术有限公司 | Flow battery pile structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100999073B1 (en) * | 2009-03-31 | 2010-12-08 | 정진현 | A metal bipolar plate set for a fuel cell and a manufacturing method thereof |
| CN101847724B (en) * | 2010-03-31 | 2013-01-30 | 清华大学 | Bipolar plate frame and galvanic pile of flow battery |
| CN102306821B (en) * | 2011-07-08 | 2014-07-23 | 清华大学 | End plate pressing component of redox flow cell galvanic pile |
| ES2733715T3 (en) * | 2012-11-30 | 2019-12-02 | Hydraredox Tech Holdings Ltd | Mounting support plate-electrode-membrane for an electrochemical redox flow energy storage cell |
| CN103811779A (en) * | 2014-03-13 | 2014-05-21 | 大连融科储能技术发展有限公司 | Electrode frame for flow cell, galvanic pile as well as cell system |
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Application publication date: 20170503 Assignee: Xinxing Ductile Iron Pipes Co.,Ltd. Assignor: DALIAN INSTITUTE OF CHEMICAL PHYSICS, CHINESE ACADEMY OF SCIENCES Contract record no.: X2023210000177 Denomination of invention: A structure for preventing bipolar plate corrosion in a flow battery stack Granted publication date: 20190705 License type: Common License Record date: 20231116 |